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Finding the Fourth Proportional to 343,712.43, 515,501.87 and 172,888.65

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Solution

The fourth proportional to 343,712.43, 515,501.87 and 172,888.65 is: 259,299.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,712.43 : 515,501.87 = 172,888.65 : x
  2. Step 2: Convert to fraction form
    343,712.43/515,501.87 = 172,888.65/x
  3. Step 3: Cross multiply
    343,712.43x = 515,501.87 × 172,888.65
  4. Step 4: Simplify right side
    343,712.43x = 89,124,421,512.33
  5. Step 5: Solve for x
    x = 89,124,421,512.33/343,712.43
  6. Step 6: Final answer
    x = 259,299.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.